Building construction structural members joint



March 14, 1967 G. WADA 350mm BUILDING CONSTRUCTION STRUCTURAL MEMBERSJOINT Filed Nov. 15 1963 2 Sheets-Sheet 1 INVENTOR G0 I a d ATTORNEKS'March 14, I967 G. WADA 3,309,12Q

BUILDING CONSTRUCTION STRUCTURAL MEMBERS JOINT Filed Nov. 15,1963 2Sheets-Sheet '2 1N VENTOR /Z Wadi ATTORNEYS United States Patent3,309,120 BUILDING CONSTRUCTION STRUCTURAL MEMBERS JOINT Goichi Wada,Fukuoka, Japan, assignor to Kabushikl Kaisha Kyusyu Ataka Consultant,Fukuoka, Japan, a corporation of Japan Filed Nov. 15', 1963, Ser. No.324,077 Claims priority, application Japan, Nov. 22, 1962 (utilitymodels), 37/70,001, 37/70,002 1 Claim. (Ci. 287189.36)

This invention is concerned with the building construction according tosteel skeleton construction and the device for joining a corner of theskeleton of the building construction according to the steel skeletonconstruction.

The first object of this invention is to provide the buildingconstruction using the metallic member molded in Z section as a full webmember.

The second object of this invention is to provide a device for joining acorner part of the skeleton of building construction using the metallicmember folded in Z section as a full web member.

In the method for constructnig buildings with steel skeletonconstruction various kinds of section steel are used, i.e. the web ofthe column and beam formed in a lattice the web of the column and beamformed in a plate, by hot rolling, or by automatic continuous weldingprocess.

The present invention is concerned with a building construction usingmetallic Z section members (including a Z section member having ribsattached thereto) as a full web member thereof.

With this type of section, large sized frames or tapered ones can besimply formed by pressing iron plate. Thus, large scale equipment, suchas is required for manufacturing H section members is not needed, andthe cost of manufacturing is decreased. But Z section members aresubjected to eccentric twisting stress due to the fact that the line ofcenter of gravity of the Z section and the line of loading are not incoincidence. Besides the axial stress and bending stress in thedirection of a common face of the column and beam are subjected to thestress in outward direction due to the fact that the principal axis ofthe section is inclined relative to the line of loading. Referring tothe former, it can be solved by selecting the joint in such a way thatthe center of gravity line of the section is in coincidence with theline of loading, but in practical construction, some eccentric twistingcan not be avoided.

The present invention is to balance the construction by combining a Zsection member having section character as described above, in such away that the whole skeleton construction does not have twisting in thesame direction and deflection in the direction of the outside face. Insteel skeleton construction, in the method for constructing a buildingin which members are to be assembled, the joining of the members playsan important part. If the joints are incomplete, the strength of wholebuilding skeleton is lowered, and if the joints are complicated anddifiicul-t for assembly and cost of working is increased. It istherefore an object of the invention to provide for connecting themembers in such way that: the various stresses acting at the joints arecompletely resisted; assembling and disassembling are eased; extrareinforcing members and special reinforced members are not needed; andspecial instruments and working process are not required.

The present invention is concerned with the apparatus for jointing thecorner parts of a skeleton construction for a building using the fullweb section member of a metallic Z section member (including a Z sectionmember with ribs).

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Attached drawings show an example embodied according to this invention,in which,

FIG. 1 is a front view;

FIG. 2 is a plan view;

FIG. 3 is a perspective view;

FIG. 4 shows perspective views of disassembled parts of the joint partof the column and beam;

FIG. 5 shows perspective views of disassembled parts of the joint partof the beam;

FIG. 6 is a section through a column A taken along line VI-VI of FIG. 1;and

FIG. 7 is a section through a beam B taken along line VIIVII of FIG. 1.

Now, this invention will be explained referring to the attacheddrawings.

Column A and beam B are formed of metallic steel with a Z section havingflanges 1, 2, 3 and 4 protruding in the opposite direction. The columnand beam are overlapped and fastened in such a Way that the outsideflange 1 of column A and upper flange 3 of the beam B and the innerflange 2 and the lower flange 4 of the beam B are in opposingrelationship to the web center line OO of the Z section. The joint ofcolumn A and beam B and the joint of beams B, B are combined, overlappedand fixed in which a way that positions of each upper flange of beamsand of each lower flange are in opposing relationship to the web centerline OO of the Z section.

The flanges 1, 2, 3 and 4 of column A and beam B are connected to theweb overlapping each other and secured by the curved plates C and Dapplied respectively along the outside of the flanges 1 and 3 and theinner side of the flanges 2 and 4 of the corner. The fore ends offlanges 2 and 4 are attached with flanges 1 and 3 of the opponent memberfrom inside by cover plates E and F.

The cover plates for the column and beam may be fastened by a suitablemeans such as bolt fixing (including high tension friction bolts),riveting and various kinds of welding such as plug welding etc.

According to the invention, each joint of a skeleton structure, namelyin the joint of a column and beam of Z section or of a beam and beam ofZ section, the outer flange of the column and the upper flange of thebeam, the inner flange of the column and the lower flange of the beam,or the upper flange of beams, and the lower flange of the beams areplaced on opposite sides relative to the web center line. Thus, eventhough twisting stress and an outward bending stress and deflection mayoccur in each member, the direction of stress and deflection at eachnode varies inversely, and in the whole a stabilized skeleton may beformed.

Such combined construction is used most typically, in the case of agabled roof, with the left hand column and left hand beam, left handbeam and right hand beam, right hand beam and right hand columnassembled as described above and, in case of an ordinary gate typeskeleton, with the left hand column and beam, beam and right hand columnassembled in the same way.

The inventive structure may be readily applied to multispan andmulti-floor buildings.

The invention may also be constituted, as described above, with Zsection members which are longitudinally tapered.

Construction obtainable by combining such Z section members gives a goodappearance.

As this invention is constituted as described above, from the point ofview of resisting forces, firstly the web of the members are superposedresulting in having two times in thickness as a common web for the panelstress at the joint thereby insuring sufiicient safety.

For flange stress, the stresses thereof can be transmitted by making thewidth and thickness of the cover plate applied along the outer and innerflange large enough.

Especially, in case of a Z section, the width of the cover plate becomestwice as large as the common flange width and is sufficiently strong. Asthe inner flange is engaged in overlapped parts, this serves as thestiffner for the panel parts.

From the point of view of construction, firstly there is no necessityfor having additional reinforced ribs or stiifner and a cover plate ofthe Web. Naturally since there is no special reinforced member, nospecial tool or process for assembling said joint are necessitated, andthere is a room and space in which any means of bolting, riveting andwelding can be used on the site.

Since rib stiffeners etc. are not attached to the end of the column andbeam, the members may have the exact desired dimensions of the structurecorresponding to the size of roof slope etc.

What I claim is:

In a building construction, a joint between two metallic members eachhaving a Z section with first and second flanges protruding in oppositedirections from a central web, said joint comprising the intersection ofend portions of said two members in overlapping configuration with thewebs of said members lying adjacent one another and the flanges of saidmembers lying in opposing relationship relative to the Web center lineof the adjacent members, and means to secure said members comprisingfour strap members each of which has a plurality of apertures therein,said apertures being in alignment with apertures in said flanges, afirst strap member being secured to the first flange of both said firstand second members, a second strap member being secured to said secondflanges of both said first and second members, a third strap memberbeing secured to the first flange of said first member and the secondflange of said second member, and a fourth strap being secured to thesecond flange of said first member and the first flange of said secondmember.

References Cited by the Examiner UNITED STATES PATENTS 3,146,864 9/1964Nystrom et al. 52-93 FRANK L. ABBOTT, Primary Examiner.

R. S. VERMUT, Assistant Examiner.

